Diamond-holder.



No. 864,436, f D I PATENTED AUG. 27, 1907.

' E. c. STRONG & w. R. PAIGE.

DIAMOND HOLDER. urmouwn FILED JULY z. 1908.

UNITED STATES PATENT. OFFICE.

ELI CHARLES STRONG AND WILLIAM ROBERT PAIGE, OF SHEFFIELD, ENGLAND.

DIAMOND-HOLDER.

Specification of Letters Patent.

Patented Aug. 27, 1907.

Application filed July 2, 1906. Serial No- 324,517.

To all whom it may concern:

Be it known that we, ELI CHARLES Srnone and WILLIAM ROBERT PAIGE,subjects of the King of England, residing at Sheflield, Yorkshire, inEngland, have invented certain new and useful Improvements in orRelating to Diamond-Holders, of which the following is a specification.

This invention relates to diamond holders for use in dressing or truingemery wheels, grind stones and the like its object being to provide asimple and eflicient method of holding a diamond such that it may bemoved so as to present a fresh cutting edge or surface and by theemployment of which there will be no risk of the diamond dropping out ofthe holder and being lost.

In the accompanying drawings :Figure l is an elevation of the end of adiamond holder according to this invention, Fig. 2 is a vertical sectionof Fig. 1, Fig. 3 is an elevation on a reduced scale of a completeholder,

showing a modification and Fig. 4 is a vertical section illustrating amodification oi the construction shown in Fig. 2.

Like letters indicate like parts throughout the drawings.

In carrying out the present inventlon a rod A is pro vided with anydesired form of handle B at one end, and at the other end is reduced asshown at O, a small cavity D being formed at the extreme end.

A cap E is adapted to fit over the end of the rod A and is providedwitha tapered aperture F at the top approximately coinciding with thecavity D when the cap is secured to the red by the mutually engagingscrew threads A and E formed thereon. The cap E is provided with fiatfaces E to enable it to be tightly screwed home.

In assembling the parts, the cap E is held in an inverted position andthe diamond G placed therein so that one angle or face projects throughthe aperture F. The reduced end O of the rod A is then inserted into thecap and the latter is screwed on to the rod until the cavity D embracesthe diamond and suflicient pressure is placed thereon to firmly hold itin position.

As a modification a'lock-nut H may first be threaded on to the rod A andwhen sufficient pressure is exerted on the diamond by the cap E this nutmay be screwed against the end of the cap to tightly lock the parts inposition.

The shape of the reduced end G and of the cap E may be varied asdesired, Figs. 2 and 4 showing two convenient forms.

What we claim and desire to secure by Letters Patent is:- i

1. In a. diamond holder the combination of a handle, a rod extendingtherefrom having'a reduced conical end C integraLtherewith and having acavity at its extreme end, a cap inclosing the reduced end and having atapered aperture approximately coinciding with the cavity and mutuallyengaging screw threads formed inside the cap and on the rod,substantially as and for the purpose described.

2. In a diamond holder the combination of a handle, a rod extendingtherefrom having a reduced conical end C integral therewith and having acavity at its extreme end, a cap inclosing the reduced end and having atapered aperture approximately coinciding with the cavity, a diamond insaid cavity projecting through said tapered aperture and held in placeby the cap and mutually engaging screw threads formed inside the cap andon the rod, substantially as and for the purpose described.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

ELI CHARLES STRONG.

WILLIAM ROBERT PAIGE.

Witnesses:

Alt"HUR H. GREENWOOD, LUTHER .T. PARK.

